Self-filling fountain pen



Dec. 27, 1932. G. TIBALDI SELF FILLIG FOUNTAIN PEN Filed NOV. 14, 1931 n lllllll llll" Glmeppe LNVENTOR 'f1/@a Mmmm.

Patented Dec. 27, 1932 GIUSEPPE TIBALDI, F FLORENCE, ITALY SELF-FILLING FUNTAIN PEN Application filed November 14, 1931, Serial No. 574,981, and in Italy January 9, 1931.

. The pen forming the subject matter o f the present invention is of the so-called fountain type, the filling of the reservoir belng effected through the manipulation of elements which form a part of the pen itself.

This pen, of the self-filling type, is of extreme simplicity. The filling ofthe reservoir,

' which comprises a sac of elastic material, such as rubber, is effected according to the Wellknown method by flattening or contracting the sac, placing the point of the pen into a receptacle containing ink and manipulating the means which compresses and then releases the sac, whereby the latter draws in the ink as it expands.

It is the object of the present invention to provide an improved pen construction embodying the use of a single, simple arrangement, preferably made of metal which is car- 0 ried by a rotary end-piece of the pen, and

plan viewof my sectional view of the pen-cap;

. elastic sac or reservoir;

Figure 3 is a substantially longitudinal sectional view of the barrel;

Figure 4 is an elevational view of the nibcarrying joining piece provided with the Figure 5 is an elevational view of the sac attening device, and

Figure 5a is a side view of the same;

Figure 6 is an elevational view of the cylinder having the left hand rapid pitch screw;

Figure 7 is a substantially longitudinal sectional view of the rotary end piece of the pen for manipulating the presser;

Figure 8 is a substantially longitudinal sectionalview of the pen showing the sac in normal `position; and

Figure 9 is a view similar to that shown in Figure 8 except that the sac is shown compressed.

Referring to the drawing, the pin comprises the barrel or tube shaped body portion a having an external thread b at one end over The end of the barrel a, having the cap 7L, 65

is provided with a. through axial bore havin a steep pitch left hand thread z' into whic is screwed a cylindrical member le, as shown in Fig. 6.

The nib-carrying union-piece f is provided with an integral nipple at the end opposite the pen point to receive the open end of a cylindrlcal reservoir or sac Z of elastic material, the sac being disposed within the chamber m of the barrel a.

The sac operating device according to Fig. 5 comprises a band-spring 0 hailing an oiset end portion O1 and a straight portion O2, to which is attached a rigid (presser) bar or jaw n.

The offset end O1 is slightly curved transversely thereof, to ensure rigidity. Y

Referring to the cylinder lc, as will be seen from Fig. 6, the threaded portion carries a' head lc having a slotted end le', the opposite end being provided with a central cavity k2. The cavity k2 receives aloose block, which receives in turn the end of the o ffset O1 of the spring. The block turning loosely Within the cavity or recess k2 renders impossible any torsion inthe extremity of the spring.

To assemble the pen, the cylinder c is screwed almost to its full lengthinto the r thread i the head k3 and neck thereof being allowed to project beyond the end of the threaded nipple a. The cap h is screwed into the thread g care being taken to locate the transverse bore it in the cap so as to coincide with the groove or slot la of the head k3, thus permitting the introduction of a pin p through the bore it', and groove 7;. According to this construction a connection between the cap and barrel is established to permit operation of the pen. The spring (Fig. 5) is introduced into the barrel through the end having the union f which when screwed into place engages and anchors the straight end O2 of the spring. The odset end O1 of the spring o is seated in the aperture cg of the screw-cylinder 1.

In the operation of filling the pen the cap L is rotated sufficiently to roject the screw cylinder a considerable distance along its axis and against the oii'set end O1 of the spring O, because the thread of the cylinder c is the thread of a pitch the reverse of that ofthe cap z and the pitch of the thread is very steep, so that while the cap k is being unscrewed it moves backward very slightly while the cylinder on the contrary, advances a considerable distance and very rapidly. The spring o is contracted by the inward movement of the screw cylinder and is caused to buckle at its mid portion in the direction of the sac. The jaw n carried by the spring 0 presses against the side of the sac causing it to collapse as shown in Figure 9. At this point, the pen point is dipped into a receptacle containing ink. The cap 71. is then screwed up again, allowing the cy1inder c to retract and release the spring 0 which, on returning to its position of rest, will, in its turn, leave the ink until it has become filled to its capacity. The shoulder under the head 7c3 of the screw cylinder 7c is provided to contact with the nipple a and so limit the length of the stroke of the said cylinder to the required extent; and to prevent it even under great strain, from advancing beyond a certain point beyond what is necessary. f Another variation of the example delineated might be that of rendering the endpiece male (i. e. externally threaded) and correspondingly rendering female the end part of the body a, the thread g being internal.

Having now particularly described and as certained the nature of my said invention and in what manner the same is to be performed, I declare that what I claim is:

1. In a fountain pen, a hollow barrel, a compressible sac therein, a spring for compressing the sac. and a rotary screw in said barrel directly abutting one end of the spring to contract and force the latter against the sac when screwed into thebarrel.

2. In a fountain pen, a hollow barrel, a pen carrying union a compressible sac attached to the union and disposed in the barrel, a spring to compress the sac abutting the union at one end and projecting along the sac towards the other end of the barrel, a rotary screw having a rapid pitch screwed into the last mentioned 4 sac Z free to draw in' being slower in one end of the barrel,

end ofthe barrel and adapted to abut the adjacent end of the spring, and a rotary cap mounted on the barrel and connected to the screw, whereby rotary movement of the cap will impart simultaneous rotary and axial movement to the screw to buckle the spring as the space between its ends is reduced.

3. In a fountain pen, a hollow barrel, a pen carrying union mounted in one end of the barrel, a compressible sac carried by the union and disposed in the barrel, a spring to compress the sac abutting the union at one end and projecting along the sac towards the other end of the barrel, a screw having a rapid pitch thread screwed into the barrel and provided with a recess to receive the adjacent end of the spring, said screw having a slotted endportion projecting beyond the barrel, a cap to screw over the end of the barrel carrying the screw, the' threads receiving the cap being opposite to those of the screw, and a pin projecting transversely of the cap and through theslotted end of the screw, whereby rotary movement of the rotary and buckle the ends is reduced.

4. A fountain pen, as claimed in claimB, in which the spring comprises a straight portion projecting from the union to the free end of the sac and an offset end portion to pass around the end of the sac and into the 'center of the screw, and a jaw attached to the spring at the .center of the straight portion, between the latter and the sac.

5. In a. fountain pen, a hollow barrel, a compressible sac therein, a spring for compressing the sac, a vrotary screw having a rapid pitch thread and against one end the same against the to the rotary of the barrel,

of the spring to buckle sac, and a cap attached screw and screwed onto the end the axial movement of the cap and opposite to that imparted to the screw when both members are 4rotating in the same direction.

6. A fountain pen, as claimed in claim 3, in which the slotted end of the screw comprises a head having a shoulder abutting the adjacent end of the barrell to prevent axial movement of the cap beyond a certain point.

In testimony whereof I aflix my signature.

GIUSEPPE TIBALDI.

screwed into the barrel cap will impart a simultaneousgo 

